O'Sullivan, E B; Collins, SM; Daugas, J-M; Domenichetti, L; Heery, J; Henderson, J; Köster, U; Michelagnoli, C; Parry, T; Pascu, S; Regan, P H; Shearman, R (2025) Towards complete decay spectroscopy of 152Tb. Radiation Physics and Chemistry, 232. 112641 ISSN 0969806X

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Abstract

The radionuclide 152Tb, decaying by β+ emission and electron capture to 152Gd with T1/2 = 17.8784(95) h, has been shown in its first in-human use to be suitable for positron emission tomography (PET) imaging. As a member of the terbium theragnostic quartet, this radionuclide has potential applications in personalised cancer treatments. Sources of 152Tb were produced by proton-induced spallation of a tantalum target and on-line mass separation at CERN-ISOLDE and delivered to ILL Grenoble, where gamma-gamma coincidence spectroscopy of excited states populated in 152Gd following the decay was carried out using the Fission Product Prompt γ-ray Spectrometer (FIPPS). Preliminary analysis has resulted in the identification of multiple previously unreported excited states in 152Gd, thirteen of which are reported here at excitation energies up to 3746 keV. Angular correlation analysis has been used to provide initial spin and parity assignments to excited states. The result of the completed spectroscopy will be a revised gamma-ray and β+ dose to patients compared to the current expected values.

Item Type:	Article
Keywords:	Nuclear data, medical radioisotopes, gamma-ray spectroscopy.
Subjects:	Ionising Radiation > Radioactivity
Divisions:	Medical, Marine & Nuclear
Identification number/DOI:	10.1016/j.radphyschem.2025.112641
Last Modified:	11 Mar 2026 15:07
URI:	https://eprintspublications.npl.co.uk/id/eprint/10300